Assessing Safety and Environmental Performance of Biomass-Derived Organic Nanomaterials Using a Proposed SSbD-Informed Evidence Matrix

Abstract

Renewable feedstocks do not establish the safety or environmental sustainability of biomass-derived organic nanomaterials. This critical review examines nanocellulose, lignin and suberin assemblies, chitin and chitosan nanoforms, starch nanoforms, and protein nanoparticles, particularly zein. It distinguishes material-specific experimental evidence from indirect comparators and evaluates the correspondence between claims, measured endpoints, and exposure conditions. Surface modification, counterions, formulation, aggregation, and the receiving environment can alter biological accessibility, degradation, and hazard. Mass loss, particle disappearance, enzymatic cleavage, or short acute assays alone cannot establish ultimate biodegradation or environmental safety. Life-cycle studies identify chemical inputs, recovery, water handling, drying, and energy supply as recurring environmental hotspots. The proposed BioNano-Benignity Evidence Matrix organizes these findings into nine domains linking provenance, process chemistry, nanoform identity, transformation, ultimate degradation, release and exposure, hazard, end-of-life fit, and comparative life-cycle performance. Informed by safe and sustainable by design, it uses applicability levels and non-compensatory decision gates rather than an aggregate benignity score. A literature-based development scenario and a retrospective life-cycle assessment illustrate bounded application; neither validates the matrix. Environmental claims therefore require evidence matched to the nanoform, function, receiving environment, and comparator, with unresolved uncertainties stated explicitly.

Abstract as supplied by the indexing source. © the authors / publisher.